[Safety material]: Made from 100% pure virgin silicone.FDA food grade silicone is BPA free and re-usable so you will never have to use plastic wrap. Working temture range: -40230. [Steam port design]: Our heat-resistant silicone lid lets off some steam while you cook.Its an ideal microwave and stove top lid that seals in goodness as you cook, while letting out just enough steam to prevent boiling over. [Perfect freshness]: Your vegetables and rice will be ship-shape Perfect to store and reheat leftovers, keep food fresh, maintain food and drink temtures, retain steam while cooking, cut down on food waste and save time in the kitchen. [Size]: Multiple size lids, sized 5.6, 8 and 10, will create air tight seals on all your smooth rimmed bowls and containers. [Package Content]: 3 x Silicone Lid. Use the Silicone Suction Lids to create a water and airtight seal on any container for any leftover food